body {
  margin: 0;
}

div {
  box-sizing: border-box;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
  font-weight: normal;
}

ul,
li {
  margin: 0;
  padding: 0;
  list-style: none;
}

img {
  width: 100%;
  height: 100%;
}

a {
  text-decoration: none;
}

.list-hd {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 44px;
  background-color: orange;
  color: #fff;
  line-height: 44px;
  text-align: center;
  z-index: 2;
}

.container {
  margin-top: 44px;
}